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Steam Cylinder in Loam.

mould being thus forced upward, where it escapes at holes there
provided, termed risers. The mouth of the pouring gate should
of course be a little higher than the top of the cylinder. Venting
is rarely necessary in loam moulding, except for such pieces as the
long S cores. Piece R, Fig. 34, is left for the purpose of receiving

TOP   Of P/T

THE   A7OCSL.D

BOTTOM    Of~  PIT

FJUQ. 34. SZecurv CyMruter: